package common.support;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.logging.Level;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import org.apache.log4j.Logger;


public class MobileEncryptKit {
	private static Logger log = Logger.getLogger(MobileEncryptKit.class);
    public static final String MOBILE_ENCRYPT_CODE = "Szfore68638";
    
    public static String encryptMobileText(String text) {
        return  parseByte2HexStr(encrypt(text, MOBILE_ENCRYPT_CODE));
    }

    public static String decryptMobileText(String encryptText) throws UnsupportedEncodingException {
         return   new String(decrypt(parseHexStr2Byte(encryptText), MOBILE_ENCRYPT_CODE),"utf-8");

    }
    public static byte[] encrypt(String content, String password) {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes("utf-8")));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
            byte[] result = cipher.doFinal(byteContent);
            return result; // 加密
        } catch (NoSuchAlgorithmException e) {
        	 log.error("MobileEncryptKit encrypt " + e.getMessage());
        } catch (NoSuchPaddingException e) {
            log.error("MobileEncryptKit encrypt " + e.getMessage());
        } catch (InvalidKeyException e) {
        	log.error("MobileEncryptKit encrypt " + e.getMessage());
        } catch (UnsupportedEncodingException e) {
        	log.error("MobileEncryptKit encrypt " + e.getMessage());
        } catch (IllegalBlockSizeException e) {
        	log.error("MobileEncryptKit encrypt " + e.getMessage());
        } catch (BadPaddingException e) {
         log.error("MobileEncryptKit encrypt " + e.getMessage());
        }
        return null;
    }
    public static byte[] decrypt(byte[] content, String password) {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes("utf-8")));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
            cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
            byte[] result = cipher.doFinal(content);
            return result; // 加密
        } catch (NoSuchAlgorithmException e) {
            log.error("MobileEncryptKit decrypt " + e.getMessage());
        } catch (NoSuchPaddingException e) {
            log.error("MobileEncryptKit decrypt" + e.getMessage());
        } catch (InvalidKeyException e) {
            log.error("MobileEncryptKit decrypt" + e.getMessage());
        } catch (IllegalBlockSizeException e) {
            log.error("MobileEncryptKit decrypt" + e.getMessage());
        } catch (BadPaddingException e) {
            log.error("MobileEncryptKit decrypt" + e.getMessage());
        } catch (UnsupportedEncodingException ex) {
        	log.error("decrypt"+Level.SEVERE + ex.getMessage());
        }
        return null;
    }
    public static String parseByte2HexStr(byte buf[]) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < buf.length; i++) {
            String hex = Integer.toHexString(buf[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            sb.append(hex.toUpperCase());
        }
        return sb.toString();
    }
    public static byte[] parseHexStr2Byte(String hexStr) {
        if (hexStr.length() < 1)
            return null;
        byte[] result = new byte[hexStr.length()/2];
        for (int i = 0;i< hexStr.length()/2; i++) {
            int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
            int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
            result[i] = (byte) (high * 16 + low);
        }
        return result;
    }
    
    
    public static void main(String[] args) throws UnsupportedEncodingException {
		String content = "苏打粉是打开啦";
		String encrypt = encryptMobileText(content);
		log.info("encrypt:"+encrypt);		
		String origin = decryptMobileText(encrypt);
		log.info("origin"+origin);		
	}
}
